Thompson D L, Thompson W R, Prestridge T J, Bailey J G, Bean M H, Brown S P, McDaniel J B
Laboratory of Applied Physiology, University of Southern Mississippi, Hattiesburg.
J Sports Med Phys Fitness. 1991 Dec;31(4):565-70.
Since 1983, bioelectric impedance has been researched with respect to its validity and reliability in the determination of body composition. It continues to be compared to hydrostatic weighing, the anthropometric "gold standard". This study was designed to investigate the relationship between bioelectric impedance analysis (BIA) and hydrodensitometry (HW) under three conditions: control, hydration and dehydration. Caucasian males (aged 18-44 years) served as subjects (n = 10). Body composition was determined by BIA and HW before intervention, 30 minutes post-hydration, and following a combination of exercise and sitting in a steam room to decrease body weight by two to four percent (mean = 2.81%). Statistical treatment by two-way analysis of variance for repeated measures revealed that although there were no significant differences between the two techniques of body composition determination under any of the three conditions, there was a statistically significant decrease in percent body fat determined in the dehydrated state as compared to the control and hydrated conditions. Recommendations include the determination of hydration state prior to engaging in body composition analysis by either method.
自1983年以来，生物电阻抗在人体成分测定中的有效性和可靠性就一直受到研究。它仍在与人体测量学的“黄金标准”——水下称重法进行比较。本研究旨在调查在三种条件下生物电阻抗分析（BIA）与体密度测定法（HW）之间的关系：对照、水合和脱水。白人男性（年龄在18至44岁之间）作为受试者（n = 10）。在干预前、水合后30分钟以及在进行运动并在蒸汽室中坐一段时间以使体重减轻2%至4%（平均 = 2.81%）之后，通过BIA和HW测定身体成分。对重复测量进行双向方差分析的统计处理表明，尽管在三种条件中的任何一种条件下，两种身体成分测定技术之间均无显著差异，但与对照和水合条件相比，脱水状态下测定的体脂百分比有统计学意义的下降。建议包括在通过任何一种方法进行身体成分分析之前确定水合状态。
